Doweling-jig.



W. H. HERITAGE.

DOWELING JIG.

APPLICATION FILED JUNE 20I 19 17.

1 gfig 1H. 1 Patented June 18, 1918.

3 SHEETS-SHEET I.

fiz zi/frzye W. H. HERITAGE. DOWELINGJIG. APPLICATION FILED JUNE 20, 19H.

II. II I. Patented June 18, 1918.

3 SHEETS-SHEET 2.

I 0 mm w. H. HERITAGE.

DOWELINGJIG.

APPLICATION'FILED JUNE 20.1917.

Patented June 18, 1918.

3 SHEETS-SHEET 3- WILLIAM H. HERITAGE, 40F PHILADELPHIA, FFNFTFYLVANTA.

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1l,269,91l1l.

specification of Letters Patent.

Patented June in, 1912.

Application filed June 20, 1917. Serial No. 175,729.

To all whom it may concern:

Be it known that l, WmnIAM H, Han rrnen, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful limprovements in Doweling-Jigs, of which the following is a specification.

My invention consists of an improved doweling jig and is particularly adapted for carpenters and cabinet makers use. Que object of my invention is to provide a jlg of the above described type which will facilitate the production of doweled joints of various descriptions.

Another object of my invention is to construct my improved jig that it can be quickly and easily manipulated to permit the holes for dowel pins to be accurately drilled.

A further object is to provide my improved jig with graduated; scales or ga es which are so arranged that the dowel ho es can be bored at accurately measured distances apart or if desired holes ean be bored which will facilitate the formation of mortises such for example as used in the production of mortise and tenon joints.

A still further object is toprovide my improved jig with clamping means whereby the material to be bored can be held in position.

These objects, and other advantageous ends which will be described hereinafter, ll attain in the following manner, reference bein had to the accompanying drawings in which Figure 1 vention.

Fig. 2 is a top plan view.

Fig. 3 is a transverse section taken on the line 33- of Fig. 2.

Fl 4: is a longitudinal section taken on the line 4-4 of'Fig. 2.

Fig. 5 is an inverted lan view of Fig. 2.

Fig. 6 is an enlar e sectional elevation of a carriage which orms apart of my invention.

Fig. 7 is a sectional plan view of Flg. 6.

Fig. 8 shows a face view of a doweled miter joint such as is capable of being quickly produced by the aid of my invention.

Fig. 9- is a detached perspective view of is a perspective view of my ina butt or lapped joint such as can be made by the use of my improved jig.

Fig. 10 is a face view of a circular segmental joint which can be accurately and quickly produced by'using my improved jig.

Fig. 11 is a perspective view showing how spaced holes can be bored to facilitate the cutting of a mortise, the extent of the mortise being shown in dot-and-dash lines.

Referring to the drawings, 1 represents a main framewh'ich includes two parallel longitudinal beams 2 and 3 secured together with two transverse beams 4i and 5. The beams 4 and 5 are l.-shape in cross section and have their leg portions 6 and 7 secured to the upper edge surfaces 9 and 10 of the respective beams 2 and 3 in the present instance by screws 11.

The leg portions 12 and 13 of the transverse beams A and 5 form ledges upon which is adapted to slide a main carriage 14. The leg portions 15 and 16 of the beams A'and 5 serve as abutments for the opposite ends of thecarriage 14 and prevent movement of the latter in the direction of its length. i

The carriage 14 includes two longitudinally extending bars 17 and 18 which are joined at their ends by transverse bars 19 and 20. The bar 17 has a slot 21 which 'extends substantially throughout its entire length and the upper edge surface 22 is graduated to provide a scale, the graduation of the scale starting at a point directly over the inner edge surface 23 of the leg portion 6 on the beam 4 and ending at a point directly over the edge surface 24: of the leg portion 7 on the beam 5.

The carriage 141 can be secured against motion relatively to the frame 1 by means of thumb screws 25 and 26 which have their threaded shanks 27 and'28 designed to freely pass through slots 29 and 30 in the beams 4 and 5 and engage threaded openings in the end bars 19 and 20 of the carriage 14.

The diameter of the heads 31 and 32 of the thumb screws 25 and 26 is greater-than the width of the slots 29 and 30 and thereby serve to clamp the carriage to the frame.

A graduated plate or scale 33 rests and is designed to slide upon the ed e surface 9 of ice ion

the beam 2 in the directiono the length of I v the beains 4 and 5, the plate 33 being slotted adjacent its opposite ends as shown at 34. Headed screws 35 extend through the slots, 34 and serve to adjustably secure the scale 33 to the beam 2. The opposite ends of the scale 33 abut the surfaces 23 and 24 of the beams 4 and 5, and similar graduations on the scale 33 are designed to register with corresponding graduations on the top of the bar 17.

The scale plate 33 is of reater width than the edge surface 9 of t e beam 2 so that it can overhang the surface 36 of the beam 2 as clearly shown in Fig. pose of this latter mentione construction will be understood from the following description. A threaded clamping rod 37 is operatively mounted within a threaded hole 38 in the beam 3. The outer end of'the rod 37 is provided with a handle 39 by which it can be turned to move a clamping head 40 toward or from the surface 36 of the beam 2 so that the wood or other material which I is to be bored or drilled can be held between the clamping head and the surface 36, said overhanging portion of the scale plate servin as a limiting member or stop to proper y position the material with respect to drill or bit guiding means which will now be described. I

The carriage 14 forms a support and guiding means for drill or bit guiding carriages 41-, there being two illustrated in the accompanying drawings: Since these latter mentioned carriages are of similar construction and similarly actuated and controlled, it will be necessary to describe but one in detail and it will be understood that each has parts similar to those described.

Each carriage 41 includes a block 42 which has a notched portion 43 designed to embrace the upper and inner surfaces of the bar 18 on the carriage. The end of the block 42 opposite the notch 43 is provided with a boss 44 designed to project and slide within the slot 21 in the rail 17 of the carriage 14.

A thumb'screw 45 has its head 46 adapted to engage the outer surface of the bar 17 .and its threaded stem designed to freely pass through the slot 21 and engage a threaded hole which leads into the block 42 through the boss 44. Thus the carriages 41 can be secured to the bar 17 in various positions within the length of the carriage 14.

Each block "42 has a hole 47 extending therethrough the holes havin V-shape portions 48 in which are held dr11l or bit guiding cylindrical tubes 49. The tubes 49 are held in the \I-shaped portions of the holes by securing rods 50 which have hooked ends 51 embracing the tubes and stems 52 threaded at their outer ends. The stems pass through the ends of the blocks 42 directly above the bar 18 and are provided with thumb nuts 53.

3. The pur- Each of the blocks 42 has a recess 54 formed therein adjacent the V-shape portion 48 of the hole 47. The recesses form receptacles for the hooked ends of the rods 50 and prevent the latter from turning. The pits 55 of the V-shape portions 48 are preferably formed centrally within the widths of the respective blocks 42 and a gage line 56 is formed centrally on the upper surfaces of and extend to the end of the block so as to register with the graduations on the bar 17 (see Fig. 2). Thus the axes of the tubes 49 are coincident with planes passing through the lines 56 and its 55 of the respective blocks 42. Therefbre the distance between the axes of the tubes can be easily read upon the scale on the bar 17.

The bottom of the frame 1 is with scales 57 and 58 (see Fig. 5).

In the use of my invention, the material to be drilled or bored can be secured within the frame 1 by the clamping rod 37 and the carriages 14 and 41 can be slid and then secured so that the tubes 49 are in the desired positions to permit the insertion of the drills 0r bits therethrough. The position of the tubes 49 with respect to the length of the frame 1 and carriage 14 can be read and determined by the a1d of the graduations on the bar 17 and scale late 33, and the positions of the tubes wit respect to the width of the frame can be read and determined by the aid of the scales 5 7 and 58.

Thus, my invention is of extremely practical value since by its use holes can be quickly and accurately drilled or bored and the location of and the distances between provided the holes can be accurately determined.

While I have described my invention as taking a particular form, it will be understood that the various parts of my invention may be changed without departing from the spirit thereof, and hence I do not limit myself to the precise construction set forth, but consider that I am at liberty to make such changes and alterations as fairly come within the scope of the appended claims.

Having thus described my invention, what I claim as new and 'desire to secure by Letters Patent is:

'1. A doweling jig including a frame having an opening; a carriage slidably secured to said frame and adapted to be moved over said opening, said carriage and frame each having graduated portions adapted to register with each other; means for clamping material, to be drilled, to said frame so that a portion of said material is adj acent to the graduations thereon; and drill guiding members movably secured to said carriage and movable in directions transversely to the direction of movement of said carriage, said drill guiding members having portions adapted to register with the lit) raeaei i j graduated portion onsaid carriage so that irrespective of the position of the carriage on the frame the drill guiding members can be moved directly over portions measured by the graduations on the frame, substantially as described.

2. A doweling jigincluding a frame having an opening; a carriage slidably secured to said frame and adapted to be moved over said opening, said carriage and frame each having graduated portions adapted to register with each other; means for clamping material, to be drilled, to said frame so that a portion of said material is adjacent to the graduations thereon; and drill guiding members movably secured to said carriage and movable in directions transversely to the direction of movement of said carriage, said drill guiding members having portions adapted to register with the graduated portion on said carriage so that irrespective of the position of the carriage on the frame the drill guiding members can be moved directly over portions measured by the graduatlons on the frame; said clamping means being movable in a plane parallel with the plane of movement of said carriage, substantially as described.

8. A doweling jig including a frame having two longitudinally extending beams spaced apart and two transversely extending beams spaced apart; a carriage having its opposite ends slidably mounted on the respective transverse beams and having a graduated portion extending between said transverse beams; drill guiding portions mounted on said carriage and movable toward and from said transverse beams, said drill guiding members having portions adapted to register with the graduated portion of said carriage; a graduated plate mounted on one of said longitudinal beams and having a portion overhanging the inner surface of said latter beams to provide a stop for the uppermost surface of the material to be drilled; and means for clamping an adjacent surface of said material against the inner surface of the latter mentioned longitudinal beam, said graduated portion of the carria e and the graduations of said plate being a apted to register with each other, substantially as described.

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4. A doweling jig including a frame having two longitudinally extendlng beams spaced apart and two transversely extending beams spaced apart; a carnage having its opposite ends slidably mounted on the respective transverse beams and havmga graduated portion extending between said transverse beamsdrill guidin portions mounted on said carriage and movable toward and from said transverse beams, said drill guiding; members portions adapted to register with the auated por-.

tion of said carriage; a graduated plate mounted on one of said longitudinal beams and having a portion overhanging the inner surface of said latter beams to provide a stop for the uppermost surface of the material to be drilled; and means for clamp ing an adjacent surface of said material against the inner surface of the latter men tioned longitudinal beam, said graduated portion of the carriage and the graduations of said plate being adapted to register with each other, said plate being movably mounted on said frame and movable into a position so as not to overhang the inner surface of the beam upon which it is mounted, substantially as described.

5. A doweling jig including a frame having two longitudinally extending beams spaced apart and two transversely extending beams spaced apart; a carriage mounted on said frame; drill guiding members mounted on said carriage and movable toward and from said transverse beams; a plate mounted on one of said longitudinal beams and having a portion adapted to overhang the inner surface of said latter beam; means for clamping material, to be drilled, against said inner surface of the latter mentioned longitudinal beam; said plate having graduations thereon extending between said transverse beams, said plate having slots therein; and means extending through said slots for se curing the plate to said latter longitudinal beam but permitting the plate to be moved into a position so as not to overhang said surface of said latter beam, substantially as described. I 6. A doweling jig'including a frame having two longitudinally extending beams spaced apart and two transversely extending beams spaced apart; a carriage having its opposite ends slidably mounted on the respective transverse beams; means for adjustably securing said ends of the carriage to the transverse beams; drill guiding members mounted on said carriage and movable toward and from said transverse beams, said carriage including a bar which has graduations extending between said transverse beams, said drill guiding members having portions adapted to register with the graduations of said bar; means on one of said longitudinal bars having gradu'ations registering with the graduations on said bar; and means for clamping material, to be drilled, to said frame, substantially as described. 1

7. A doweling jig including a frame, a carriage slidable transversely on said frame and having a graduated bar extending longitudinally of the frame and carriage, drill guiding means slidably mounted on said carriage transversely to the movement of said carriage on the frame and having por- 'dll lid

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tions designed to register with the graduations on the bar to indicate the distance between the drill uidin means and the distance of the dril gui ing means from the 5 transverse opposite ends of the frame, and

means on said frame having graduations' registering with the graduations on said bar, said latter means being located adjacent a surface of said frame against which the material to be drilled is secured, substan- 10 tially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

. WILLIAM H. HERITAGE.

Witnesses:

AUGUSTUS B. Corpse, HARRY T. ROTENBURY. 

